Safety-lock.



No. 665,296: Patented 1an. I, I90I.

W. WISCHEW' &. P. KOSSUV. SAFETY LUCK.

(Application filed Dec. 14, 1899.) (NoModel.) 2 Sheets-Sheet I.

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No. 665,296. Patented lan. I, |90I.

W. WISCHEW &. P. KOSSOV.

SAFETY LUCK.

(Application led Dec. 14. 1899. i

2 sheets-sheet z.

(No Model.)

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STATES ATENT .Finne` SAFETY-LOCK.

SPECIFICATION forming part of Letters Patent No. 665,296, dated January 1, 1901.

Application filed December 14, 1.899. Serial No. 740,349. KNO model.)

To ctZZ whom t may concern:

Be it known that We, WAsILY WIsoHEW and PETER KOSSOV, subjects of the Emperor of Russia, residing at St. Petersburg, Russia, have invented certain new and useful Improvements in Safety-Locks for Doors and the Like, of which the following is a specification.

Our invention has forits object an improvement in safety-locks of our system, (for which a United States Patent has been applied for on the 28th of December, 1898, Serial No. 700,529.)

The object of this improvement is to insure an absolute impossibility of opening the lock otherwise than by a special key. For this purpose we provide in the barrel or cylinder of our lock spring-pawls, which when the barrel is rotated otherwise than by a special key abut against a stop provided in the chamber which surrounds the said barrel, but when the proper key is applied it forces the sprin gpawls to enter in the recesses wherein they are located, so that they will not be arrested by said stop and will permit the entire revolution of the barrel, and consequently the opening of the lock, as will be hereinafter fully explained.

In the accompanying drawings, Figures l to 7 represent the same views of ourlock as in our previous patent application. Fig. l is a side View of the lock. Fig. 2 is a front view; Fig. 3, a cross-section; Fig. 4., an end View; Fig. 5, a rear View; Fig. 6, side and end views of the key, and Fig. 7 a section of the pinion on the axle of the cylinder. Fig. 8 represents a cross-section and a side View of the barrel or cylinder provided with safety-pawls. In Fig. 6 the arrangement of' the barrel or cylinder provided with safety-pawls in its place in the lock is shown.

ct is the cylinder or barrel with projections a; on its surface; b, a pinion on the axis of the cylinder ot; c, a rack on the side of the lock-bolt g; CZ, levers; e, spindle entering in the lock-bolt g; Zt, spring of the levers CZ,` t', passage or slot for the key Zo; Z, casing of the lock; ln, a rod or axis of the levers CZ; o o, holes for attaching the lock to the door or the like; p, a recess in the bolt g for the spindle e; Z, a falseway for the key; A, a pinion; B, Curved rod sliding in said pinion; C, pin fixed in the shaft of the cylinder ot; D, spiral spring acting on the rod B, and Z, cnt-out for the stroke of the pin C.

The cylinder or barrel a must make an entire revolution in order to unlock or open the lock. In order absolutely to prevent the possibility of such rotating of the barrel a by some other meansfor instance, by a metallic Wire or thin rod-than a special key 7c, We provide the barrel a with transverse recesses, Fig. 8, in which we arrange spring-pawls a2, pivoted on a shaft or rod C2 and supported by spiral springs t2 in such a manner that one end of each of these pawls projects externally beyond the surface of the barrel ot. The other end or arm of the pawl a2 is acted upon by a small rod ct, also located in the barrel ct and having its end slightly projecting from the surface ofthe barrel. The chamber of the casing Z, Fig. 3, in which the barrel is located, is made eccentric to this barrel and is provided with a stop Z2.

If the barrel a be rotated, not by inserting a key k, Fig. 6, but some other instru ment-for instance, by a thin metallic rod-in the passage vl, Fig. 3, and should such instrument not be diverted in the falseway t, a partial rotation of the barrel a could be produced, but the pawl a2 will surely arrest such rotation as soon as it is stopped at Z2. On the contrary, by inserting the key k, in which no hole, such as x2, is made for the end ot' the pin ct, this pin will be depressed (after a partial rotation of the barrel a) by the plain portion of the key, causing the pawl a2 to be turned on its pivot b2 sufficiently to avoid its meeting with the stop Z2. It is evident that by arranging a number of such pawls a2 as shown in Fig. 8 this arrangement excludes all possibility of a fraudulent opening of the lock, even if one of these pawls could be occasionaly depressed.

We claim as our inventionl. The combination in a lock, of a rotatable cylinder provided with projections on its surface to enter corresponding recesses in a key, and with transverse recesses, of spring-pawls in said recesses, and pins socketed in the cylinder with their inner ends bearing on the pawls and their outer ends projecting beyond the periphery of the cylinder, substantially as described.

IOO

2. Tn e look the combination with .fr boit their outer ends projecting beyond the snrhnving rack-teeth, of a cylinder htm/'ing` corface of the cylinder in the path of the key responding teeth for actuating the bolt, said when inserted in the lock, substantially as cylinder having transverse recesses, u casing described. 15 5 for containing the cylinder eccentric thereto In witness whereof we have hereunto set i and provided with an interior stop, projeeour hands in presence of two Witnesses. tions on the cylinder, to engage correspond- VASILY \VISCHEW. i ing,r recesses in a key, spring-penis pivotnlly PETER KOSSOV.

seated in the transverse recesses of the bar- Witnesses: lo rel and pins passing through the cylinder, N. TSCHEKALOFF,

their inner ends bearing on the pawls and J. BLAU. 

